873
FNCA52 TJSJ 201930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST TUE OCT 20 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-210800-
SOUTHEAST COASTAL PLAINS-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY MCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 20 30 60 60
TEMP (24H TREND) 74 (-1) 91 (+2) 74 90
RH % (24H TREND) 90 (+1) 52 (-6) 92 56
WIND 20FT/EARLY(MPH) LGT/VAR E 8 E 5 E 11
WIND 20FT/LATE(MPH) LGT/VAR SE 8 E 5 SE 11
MIXING HGT(FT-AGL/MSL) 4660 4330
TRANSPORT WND (MPH) SE 9 E 13
VENT RATE (KT-FT) 37280 47630
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-210800-
SOUTHERN HILLS-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 20 30 60 60
TEMP (24H TREND) 70 (-2) 88 (+3) 70 88
RH % (24H TREND) 96 (+3) 59 (-8) 99 64
WIND 20FT/EARLY(MPH) LGT/VAR SE 9 E 6 SE 11
WIND 20FT/LATE(MPH) LGT/VAR SE 10 E 5 SE 11
MIXING HGT(FT-AGL/MSL) 5340 4730
TRANSPORT WND (MPH) SE 9 SE 13
VENT RATE (KT-FT) 42720 52030
DISPERSION 5 5
DSI 1 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-210800-
NORTH COASTAL PLAINS-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 50 20 90
TEMP (24H TREND) 72 (-3) 91 (+2) 72 91
RH % (24H TREND) 98 (+3) 59 (-8) 99 61
WIND 20FT/EARLY(MPH) S 6 SE 6 SE 10 SE 11
WIND 20FT/LATE(MPH) LGT/VAR NE 11 SE 5 E 12
MIXING HGT(FT-AGL/MSL) 5130 4720
TRANSPORT WND (MPH) SE 7 SE 10
VENT RATE (KT-FT) 30780 42480
DISPERSION 5 5
DSI 2 6 2 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-210800-
NORTHERN HILLS-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY MCLEAR MCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 50 50 20 100
TEMP (24H TREND) 70 (-2) 89 (+1) 70 90
RH % (24H TREND) 98 (+1) 60 (-6) 99 63
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR SE 8 SE 8
WIND 20FT/LATE(MPH) LGT/VAR NE 8 LGT/VAR E 10
MIXING HGT(FT-AGL/MSL) 5210 4790
TRANSPORT WND (MPH) S 5 SE 9
VENT RATE (KT-FT) 20840 38320
DISPERSION 5 5
DSI 1 6 1 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-210800-
WEST COAST-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR MCLEAR PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 20 10 40 80
TEMP (24H TREND) 72 (-2) 92 (+2) 72 91
RH % (24H TREND) 95 (0) 59 (-6) 96 62
WIND 20FT/EARLY(MPH) E 6 SE 11 E 12 SE 12
WIND 20FT/LATE(MPH) E 8 SE 12 E 8 SE 12
MIXING HGT(FT-AGL/MSL) 4580 4060
TRANSPORT WND (MPH) SE 14 SE 12
VENT RATE (KT-FT) 54960 40600
DISPERSION 5 5
DSI 3 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-210800-
EASTERN INTERIOR-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 40 40 60 90
TEMP (24H TREND) 71 (-3) 90 (+3) 71 89
RH % (24H TREND) 96 (+1) 59 (-7) 99 62
WIND 20FT/EARLY(MPH) S 6 SE 8 SE 8 SE 10
WIND 20FT/LATE(MPH) S 5 SE 10 SE 6 SE 11
MIXING HGT(FT-AGL/MSL) 6300 5090
TRANSPORT WND (MPH) S 10 SE 13
VENT RATE (KT-FT) 56700 55990
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-210800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY MCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 50 30 60 70
TEMP (24H TREND) 70 (-2) 87 (+4) 70 87
RH % (24H TREND) 99 (+2) 61 (-8) 100 64
WIND 20FT/EARLY(MPH) SE 5 SE 6 SE 6 SE 10
WIND 20FT/LATE(MPH) LGT/VAR SE 9 SE 5 SE 10
MIXING HGT(FT-AGL/MSL) 4640 4170
TRANSPORT WND (MPH) S 10 SE 13
VENT RATE (KT-FT) 41760 45870
DISPERSION 5 5
DSI 2 6 3 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-210800-
CENTRAL MOUNTAIN RANGE-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 20 30 40 100
TEMP (24H TREND) 68 (-2) 87 (+5) 68 86
RH % (24H TREND) 98 (+2) 61 (-11) 99 66
WIND 20FT/EARLY(MPH) SE 5 SE 8 SE 9 SE 8
WIND 20FT/LATE(MPH) SE 5 SE 10 LGT/VAR SE 10
MIXING HGT(FT-AGL/MSL) 6350 5060
TRANSPORT WND (MPH) S 9 SE 10
VENT RATE (KT-FT) 50800 45540
DISPERSION 5 5
DSI 1 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-210800-
CAYEY MOUNTAIN RANGE-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY MCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 40 40 60 80
TEMP (24H TREND) 70 (-2) 85 (+2) 70 85
RH % (24H TREND) 98 (+1) 62 (-6) 100 66
WIND 20FT/EARLY(MPH) LGT/VAR SE 6 LGT/VAR SE 9
WIND 20FT/LATE(MPH) LGT/VAR SE 9 LGT/VAR SE 9
MIXING HGT(FT-AGL/MSL) 5280 4680
TRANSPORT WND (MPH) S 10 SE 13
VENT RATE (KT-FT) 47520 51480
DISPERSION 5 5
DSI 1 6 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-210800-
VIEQUES-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 50 30 50 50
TEMP (24H TREND) 77 (-1) 90 (+1) 78 90
RH % (24H TREND) 86 (+1) 58 (-3) 89 60
WIND 20FT/EARLY(MPH) SE 5 SE 9 SE 9 SE 11
WIND 20FT/LATE(MPH) SE 6 SE 9 SE 9 SE 11
MIXING HGT(FT-AGL/MSL) 3280 3310
TRANSPORT WND (MPH) S 10 E 13
VENT RATE (KT-FT) 29520 36410
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-210800-
CULEBRA-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 50 30 50 50
TEMP (24H TREND) 79 (-1) 89 (+1) 79 89
RH % (24H TREND) 87 (+5) 60 (-4) 89 62
WIND 20FT/EARLY(MPH) SE 6 SE 9 SE 9 SE 11
WIND 20FT/LATE(MPH) SE 6 SE 9 SE 10 SE 11
MIXING HGT(FT-AGL/MSL) 3340 3430
TRANSPORT WND (MPH) S 12 E 14
VENT RATE (KT-FT) 33400 41160
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-210800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER MCLEAR MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS TSTMS TSTMS
CHANCE PRECIP (%) 40 20 60 60
TEMP (24H TREND) 74 (-2) 91 (+1) 75 92
RH % (24H TREND) 93 (+3) 52 (-5) 93 55
WIND 20FT/EARLY(MPH) E 6 E 12 E 12 E 13 G22
WIND 20FT/LATE(MPH) E 9 SE 12 E 11 SE 16
MIXING HGT(FT-AGL/MSL) 4670 4280
TRANSPORT WND (MPH) SE 14 SE 17
VENT RATE (KT-FT) 56040 64200
DISPERSION 5 5
DSI 3 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-210800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 50 30 40 50
TEMP (24H TREND) 77 (-2) 88 (+1) 77 88
RH % (24H TREND) 87 (+3) 62 (-4) 89 64
WIND 20FT/EARLY(MPH) SE 6 SE 8 SE 10 SE 11
WIND 20FT/LATE(MPH) SE 8 SE 8 SE 10 SE 12
MIXING HGT(FT-AGL/MSL) 3180 3330
TRANSPORT WND (MPH) SE 9 SE 14
VENT RATE (KT-FT) 25440 39960
DISPERSION 5 5
DSI 5 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-210800-
ST CROIX-
330 PM AST TUE OCT 20 2026
TONIGHT WED WED NIGHT THU
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 50 30 40 50
TEMP (24H TREND) 77 (-2) 89 (+1) 77 89
RH % (24H TREND) 90 (+1) 63 (-4) 94 65
WIND 20FT/EARLY(MPH) SE 6 SE 9 SE 9 SE 12
WIND 20FT/LATE(MPH) SE 6 SE 11 SE 9 SE 12
MIXING HGT(FT-AGL/MSL) 4420 4490
TRANSPORT WND (MPH) SE 13 SE 16
VENT RATE (KT-FT) 48620 62860
DISPERSION 5 5
DSI 3 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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